Quartz & Ceramic Technology of Multi-Lab's

Boron nitride nozzles (BNN) are the ideal industry choice because of their ability to withstand high temperatures. But before learning about the advantages and applications of boron nitride nozzles. Let us first understand- in detail everything about the BN compound.

Boron nitride (BN)

Boron nitride is a refractory compound of Boron and Nitrogen. It exists in various forms that are isoelectronic to carbon lattice. The most stable BN polymorph is hexagonal. Its structure is analogous to that of crystalline graphite. The cubic BN(c-BN) has a diamond-like crystalline arrangement but is softer than the diamond. The abrasive properties of c-BN make it useful in cutting and drilling tools.

Properties

1. High heat resistance - The strength of the boron nitride is twice that of room temperature at 1800c, and sublimation occurs at 3000c. It doesn’t cool from 1500c to room temperature.

2. Excellent electrical properties - Provide electrical insulation up to 10^14 Ω-cm at 25c and 10^3 Ω-cm at 2000c. Hence this is the best high-temperature insulating material.

3. Strong corrosion resistance - BNN doesn’t react with common metals, semiconductor metals, rare earth metals, precious metals, alkalis, etc.

4. Low thermal coefficient - The thermal coefficient of BNN is 2*10^-6. It has the lowest thermal coefficient among ceramics. Moreover, its high thermal conductivity makes it tolerate thermal shocks.

5. It is machinable - It can be processed easily to build high precision parts and components as its hardness is 2 Mohs.

Hexagonal boron nitride ( h-BN)

h-BN is the most widely used polymorph because it works as a good lubricant in high and low temperatures. It is widely popular in such applications where the chemical reactivity of graphite is causing problems. The hexagonal boron nitride polymorphs offer several benefits over graphite, such as its lubricity does not need gas or water molecules to trap in between the layers. Due to this, it is possible to use h-BN in a vacuum. The cosmetic industry has leveraged the benefits of its lubricating properties for some time. However, because of the high price it usage soon stopped.

The h-BN polymorphs are similar to aromatic compounds. Its high ionic character makes it the best proton conductor and electric insulator. Of all electrical insulators, hexagonal boron nitride has the highest thermal conductivity. Due to its high thermal conductivity and chemical stability- it is used in high-temperature equipment.

Hexagonal BN is suitable for constructing ceramics, alloys, plastics, rubber, resins, bearings because of its lubricating properties, higher electrical resistivity and conductivity. Its excellent dielectric properties make it suitable to use in electronics for constructing microwave transparent windows and a lot more.

Cubic boron nitride (c-BN)

Cubic BN is insoluble in iron, nickel and other alloys. Diamond, on the other hand, is soluble in these metals. Being an excellent abrasive, they are employed in machining steel, whereas ceramics and aluminium alloys mostly use diamond abrasives.

BN forms a passive layer of boron oxide when it comes in contact with oxygen. This boron oxide layer prevents further oxidation. However, cubic BN affinity for moisture will dissolve the boron oxide layer and create conditions for hydrolysis, which sometimes seems like a drawback. The sulfurized mineral is the best, and the sulfochlorinated oil emulsion (mixed with 10% water) is the second-best coolant to use with BN.

Boron nitride nozzles

BNN unique properties make it a preferable material in manufacturing industrial nozzles. Here are five benefits of using BN nozzles in industries:

1. No-preheating

Unlike alumina and zirconia, BN nozzles do not require preheating. It can handle thermal shock every smoothly.

2. No- clogging

Most of the metals can’t wet the boron nitride nozzles, due to which there are no or rare chances of clogging.

3. High working temperature

Boron nitrides can tolerate temperatures up to 1800c in a vacuum and inert atmosphere. It is higher than most of the ceramics available.

4. Customizable

By changing the grades of BN, such as BN-2800 and BN-2300, one can alter the thermal conductivity and corrosion resistance of Boron nitride.

5. Easy prototyping

Quartz glass is an example of an insulator and does not conduct electric current, but it could be possible to make quartz glass behave like metal for a brief moment. It is possible to change the properties of quartz glass into metal. A strong laser pulse can help move the electrons freely. This can lead to a change in the properties of the material.

Technical ceramics have a range of amazing properties (inertness, resistance, strength, stability) making them suitable for various applications. Nowadays they play important role in the field of manufacturing, medicine, telecommunication, and much more.

1. Supercomputers

Technical ceramics are ideal for the manufacturing of required components for the arithmetic process. High rigidity and coefficient of thermal expansion are the properties that make it suitable for such types of applications.

2. Semiconductor

There are a lot of industrial applications of technical ceramics, including the manufacturing of semiconductors to meet the challenging conditions of semiconductor processing.

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3. Aerospace and Defense

Aerospace, defense, and aviation are industries that are difficult to imagine without technical ceramics. These application requires protection against damage, minimal heat transfer and have non-corrosive quality.

4. Space Exploration

Quartz which is the most abundant mineral in the earth’s crust has different physical properties that make it distinguishable. It comes in many shapes and colors and if you are studying minerals, you can recognise it with a single glance. These are some of the identifiers through which you will come to know about a quartz crystal.

Quartz crystal should be transparent and colorless or it should be present in light-colored rocks that could look like a smudge in a crystal.

You can inspect through the shape of the crystal that is generally a hexagonal prism.

We can test it by breaking it, it will break into bent shards instead of confronted cleavage sections. This swirling pattern is known as a conchoidal fracture.

Test the hardness of the crystal using a pocketknife (7 on the Mohs scale). Quartz is harder than a pocketknife and the surface should not have scratches.

A transparent container of high purity silica (SiO2) which is impervious to amazingly high temperatures. There are lot of industrial application where manufacturing of special alloys requires high performance container that can hold the quality of material. Other than that quartz glass crucible is also one of the member of laboratory equipment's as it resists expansion and contraction due to change in temperature.

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Quartz glass which is clear glass made opaque using certain additives. Quartz glass crucibles are ideal to make large silicon wafers of high quality and refining of certain metals. Clear glass quartz crucibles are used for the ashing of samples. From above we can conclude that these are the advantages of quartz glass crucibles-

1. Excellent dimensional stability.

2. Thermal Shock Resistance

Macor has great physical properties, high dielectric strength and high electrical resistivity. Macor is comprised of Fluorphlogopite mica in a Borosilicate glass grid with an pure white appearance like that of aluminous porcelain, however can be machined in regular ways fundamentally the same as that of metal machining, including drilling, tapping and screw cutting. Macor, contrast to high temperature plastics, the material doesn't distort. It can likewise be polished to a mirror finish if the right method is followed; Macor will work constantly at 800°C with a greatest temperature of 1000°C. Macor has no poisonous impacts, consequently this material is internationally utilized by the warriors of industry.

The use of scientific quartz glassware involves several industries and businesses. It is established by Mr Ron Jackman snr MD and his wife Mrs Audrey Jackman FD in 1984, which is accompanied by their son Mr Paul Jackman in 1988 as Production Director. Multi-Lab ltd has been providing scientific quartz glassware throughout the world but in special to universities worldwide. Today, Multi Lab is a well-known name in the production of scientific quartz glassware as well as in the manufacturing and supply of industrial ceramics.

We proceed to grow in circulation and invention technology, proving our capability to keep direction by adjusting continually to the ever-changing demands of our customers. We hold great expertise in making products for most OEMs within the microelectronics, photovoltaic, UV, IR, LED, aerospace and semiconductor sectors, and more.